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CISA-2120 Switching > Online Final Exam > Flashcards

Online Final Exam Flashcards

CCNA 3 R&S: Scaling Networks

1
Q

The ________ area interconnects with all other OSPF area types.

A

Backbone

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2
Q

A network administrator is attempting to upgrade the IOS system image on a Cisco 2901 router. After the new image has been downloaded and copied to the TFTP server, what command should be issued on the router before the IOS system image is upgraded on the router?

A

ping 10.10.10.2

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3
Q

Which address is used by an IPv6 EIGRP router as the source for hello messages?

A

the interface IPv6 link-local address

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4
Q

A network administrator issues the show ipv6 eigrp neighbors command. Which conclusion can be drawn based on the output?

A

The link-local addresses of neighbor routers interfaces are configured manually.

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5
Q

Which two conclusions can be derived from the output?

A
  1. There is one feasible successor to network 192.168.1.8/30.
  2. The neighbor 172.16.6.1 meets the feasibility condition to reach the 192.168.1.0/24 network.
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6
Q

An administrator attempts to configure EIGRP for IPv6 on a router and receives the error message that is shown. Which command must be issued by the administrator before EIGRP for IPv6 can be configured?

A

ipv6 unicast-routing

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7
Q

What two conditions have to be met in order to form a cluster that includes 5 access points?

A
  1. The APs have to be connected on the same network segment.
  2. Clustering mode must be enabled on the APs.
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8
Q

Which technological factor determines the impact of a failure domain?

A

The role of the malfunctioning device

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9
Q

Which mode configuration setting would allow formation of an EtherChannel link between switches SW1 and SW2 without sending negotiation traffic?

A
  1. SW1: on
  2. SW2: on
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10
Q

In a large enterprise network, which two functions are performed by routers at the distribution layer?

A
  1. connect remote networks
  2. provide data traffic security
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11
Q

A network engineer is implementing security on all company routers. Which two commands must be issued to force authentication via the password 1C34dE for all OSPF-enabled interfaces in the backbone area of the company network?

A
  1. area 0 authentication message-digest
  2. ip ospf message-digest-key 1 md5 1C34dE
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12
Q

When does an OSPF router become an ABR?

A

When the router has interfaces in different areas

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13
Q

Which characteristic would most influence a network design engineer to select a multilayer switch over a Layer 2 switch?

A

Ability to build a routing table

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14
Q

A network designer is considering whether to implement a switch block on the company network. What is the primary advantage of deploying a switch block?

A

The failure of a switch block will not impact all end users.

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15
Q

A network administrator enters the spanning-tree portfast bpduguard default command. What is the result of this command being issued on a Cisco switch?

A

Any switch port that has been configured with PortFast will be error-disabled if it receives a BPDU.

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16
Q

What are two differences between the Cisco IOS 12 and IOS 15 versions?

A
  1. The IOS version 15 license key is unique to each device, whereas the IOS version 12 license key is not device specific.
  2. IOS version 12.4(20)T1 is a mainline release, whereas IOS version 15.1(1)T1 is a new feature release.
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17
Q

What are two results of issuing the displayed commands on S1, S2, and S3?

A
  1. S1 will automatically adjust the priority to be the lowest.
  2. S2 can become root bridge if S1 fails.
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18
Q

A remote classroom can successfully access video-intensive streaming lectures via wired computers. However, when an 802.11n wireless access point is installed and used with 25 wireless laptops to access the same lectures, poor audio and video quality is experienced. Which wireless solution would improve the performance for the laptops?

A

Add another access point.

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19
Q

A network engineer is troubleshooting a single-area OSPFv3 implementation across routers R1, R2, and R3. During the verification of the implementation, it is noted that the routing tables on R1 and R2 do not include the entry for a remote LAN on R3. Examination of R3 shows the following:

  • that all interfaces have correct addressing
  • that the routing process has been globally configured
  • that correct router adjacencies have formed

What additional action taken on R3 could solve the problem?

A

Enable the OSPFv3 routing process on the interface connected to the remote LAN.

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20
Q

When should EIGRP automatic summarization be turned off?

A

When a network contains discontiguous network addresses

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21
Q

When will a router that is running EIGRP put a destination network in the active state?

A

When the connection to the successor of the destination network fails and there is no feasible successor available

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22
Q

Which action should be taken when planning for redundancy on a hierarchical network design?

A

Continually purchase backup equipment for the network

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23
Q

Which encryption protocol is used by the WPA2 shared key authentication technique?

A

AES

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24
Q

When the show ip ospf neighbor command is given from the R1# prompt, no output is shown. However, when the show ip interface brief command is given, all interfaces are showing up and up. What is the most likely problem?

A

R1 or R2 does not have a network statement for the 172.16.100.0 network.

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25
Q

If router B is to be configured for EIGRP AS 100, which configuration must be entered?

A
  1. B(config-router)# network 192.168.10.4 0.0.0.3
  2. B(config-router)# network 192.168.10.8 0.0.0.3
  3. B(config-router)#network 192.168.10.128 0.0.0.63
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26
Q

A network technician is troubleshooting missing OSPFv3 routes on a router. What is the cause of the problem based on the command output?

A

There is a problem with the OSPFv3 adjacency between the local router and the router that is using the neighbor ID 2.2.2.2.

27
Q

Which two conclusions can be drawn from the output?

A
  1. The EtherChannel is down.
  2. The port channel ID is 2.
28
Q

Based on the command output shown, what is the status of the EtherChannel?

A

The EtherChannel is in use and functional as indicated by the SU and P flags in the command output.

29
Q

A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?

30
Q

Users on an IEEE 801.11n network are complaining of slow speeds. The network administrator checks the AP and verifies it is operating properly. What can be done to improve the wireless performance in the network?

A

Split the wireless traffic between the 802.11n 2.4 GHz band and the 5 GHz band.

31
Q

A network administrator is troubleshooting slow performance in a Layer 2 switched network. Upon examining the IP header, the administrator notices that the TTL value is not decreasing. Why is the TTL value not decreasing?

A

This is the normal behavior for a Layer 2 network.

32
Q

What is a wireless modulation technique used by 802.11 WLAN standards that can implement MIMO?

33
Q

Which technology is an open protocol standard that allows switches to automatically bundle physical ports into a single logical link?

34
Q

A set of switches is being connected in a LAN topology. Which STP bridge priority value will make it least likely for the switch to be selected as the root?

35
Q

Which wireless network topology is being configured by a technician who is installing a keyboard, a mouse, and headphones, each of which uses Bluetooth?

A

ad hoc mode

36
Q

Which route or routes will be advertised to the router ISP if autosummarization is enabled?

A

10.0.0.0/8

37
Q

When are EIGRP update packets sent?

A

only when necessary

38
Q

Which requirement should be checked before a network administrator performs an IOS image upgrade on a router?

A

There is sufficient space in flash memory.

39
Q

What method of wireless authentication is dependent on a RADIUS authentication server?

A

WPA2 Enterprise

40
Q

A network administrator wants to verify the default delay values for the interfaces on an EIGRP-enabled router. Which command will display these values?

A

show interfaces

41
Q

A network administrator in a branch office is configuring EIGRP authentication between the branch office router and the headquarters office router. Which security credential is needed for the authentication process?

A

a common key configured with the key-string command inside a key chain

42
Q

FastEthernet 0/1 on S1 is connected to Interface FastEthernet 0/1 on S2, and Interface FastEthernet 0/2 on S1 is connected to Interface FastEthernet 0/2 on S2. What are two errors in the present EtherChannel configurations?

A
  1. Two auto modes cannot form a bundle.
  2. The channel group is inconsistent.
43
Q

Which port role is assigned to the switch port that has the lowest cost to reach the root bridge?

44
Q

What are two features of OSPF interarea route summarization?

A
  1. Routes within an area are summarized by the ABR.
  2. ABRs advertise the summarized routes into the backbone.
45
Q

What two pieces of information could be determined by a network administrator from this output?

A
  1. R1 is participating in multiarea OSPF.
  2. The metric that will be installed in the routing table for the 10.0.0.0 route will be 65 (64+1).
46
Q

A network administrator has configured an EtherChannel between two switches that are connected via four trunk links. If the physical interface for one of the trunk links changes to a down state, what happens to the EtherChannel?

A

The EtherChannel will transition to a down state.

47
Q

Which destination MAC address is used when frames are sent from the workstation to the default gateway?

A

MAC address of the virtual router

48
Q

A company has migrated from single area OSPF to multiarea. However, none of the users from network 192.168.1.0/24 in the new area can be reached by anyone in the Branch1 office. From the output in the exhibit, what is the problem?

A

There are no interarea routes in the routing table for network 192.168.1.0.

49
Q

What are two requirements when using out-of-band configuration of a Cisco IOS network device?

A
  1. a direct connection to the console or AUX port
  2. a terminal emulation client
50
Q

For troubleshooting missing EIGRP routes on a router, what three types of information can be collected using the show ip protocols command?

A
  1. any interfaces on the router that are configured as passive
  2. any ACLs that are affecting the EIGRP routing process
  3. networks that are unadvertised by the EIGRP routing protocol
51
Q

What are two requirements to be able to configure an EtherChannel between two switches?

A
  1. All the interfaces need to work at the same speed.
  2. All the interfaces need to work at the same speed.
52
Q

This type of LSA exists in multi-access & non-broadcast multi-access networks w/DR

A

Type 2 LSA

53
Q

This type of LSA describes routes to networks outside of the OSPF AS

A

Type 5 LSA

54
Q

This type of LSA is flooded only within the area which it originated

A

Type 1 LSA

55
Q

This type of LSA is used by ABR to advertise networks from other areas

A

Type 3 LSA

56
Q

At a local college, students are allowed to connect to the wireless network without using a password. Which mode is the access point using?

57
Q

What are three access layer switch features that are considered when designing a network?

A
  1. forwarding rate
  2. Power over Ethernet
  3. port density
58
Q

What can be concluded about network 192.168.1.0 in the R2 routing table?

A

This network was learned through summary LSAs from an ABR.

59
Q

Which two statements are correct about EIGRP acknowledgment packets?

A
  1. The packets are sent as unicast.
  2. The packets are unreliable.
60
Q

An STP instance has failed and frames are flooding the network. What action should be taken by the network administrator?

A

Redundant links should be physically removed until the STP instance is repaired.

61
Q

A network administrator issues the command R1(config)# license boot module c1900 technology-package securityk9 on a router. What is the effect of this command?

A

The Evaluation Right-To-Use license for the Security technology package is activated.

62
Q

A router has been removed from the network for maintenance. A new Cisco IOS software image has been successfully downloaded to a server and copied into the flash of the router. What should be done before placing the router back into service?

A

Restart the router and verify that the new image starts successfully.

63
Q

What are the two methods that are used by a wireless NIC to discover an AP?

A
  1. receiving a broadcast beacon frame
  2. transmitting a probe request
64
Q

Why did R1 and R2 not establish ad adjacency?

A

The AS number must be the same on R1 and R2.

CISA-2120 Switching (14 decks)

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